structString.CharacterView
| Inheritance |
CollectionType, Indexable, RangeReplaceableCollectionType, SequenceType
View Protocol Hierarchy →
|
|---|---|
| Associated Types |
Type alias inferred.
Type alias inferred.
Type alias inferred.
Type alias inferred. |
| Nested Types | String.CharacterView.Index |
| Import |
|
Initializers
Create an empty instance.
Declaration
init()
Create an instance containing characters.
Declaration
init<S:SequenceTypewhereS.Generator.Element==Character>(_characters:S)
Creates a collection instance that contains elements.
Declaration
init<S:SequenceTypewhereS.Generator.Element==Generator.Element>(_elements:S)
Declared In
RangeReplaceableCollectionType
1 inherited item hidden. (Show all)
Instance Variables
Returns the number of elements.
Complexity: O(1) if Index conforms to RandomAccessIndexType;
O(N) otherwise.
Declaration
varcount:String.CharacterView.Index.Distance{get}
Declared In
RangeReplaceableCollectionType
, CollectionType
The "past the end" position.
endIndex is not a valid argument to subscript, and is always
reachable from startIndex by zero or more applications of
successor().
Declaration
varendIndex:String.CharacterView.Index{get}
Returns the first element of self, or nil if self is empty.
Complexity: O(1)
Declaration
varfirst:Character? {get}
Declared In
RangeReplaceableCollectionType
, CollectionType
Returns the range of valid index values.
The result's endIndex is the same as that of self. Because
Range is half-open, iterating the values of the result produces
all valid subscript arguments for self, omitting its endIndex.
Declaration
varindices:Range<String.CharacterView.Index>{get}
Declared In
RangeReplaceableCollectionType
, CollectionType
Returns true iff self is empty.
Complexity: O(1)
Declaration
varisEmpty:Bool{get}
Declared In
RangeReplaceableCollectionType
, CollectionType
Declaration
varlast:Character? {get}
Declared In
RangeReplaceableCollectionType
, CollectionType
A collection with contents identical to self, but on which
normally-eager operations such as map and filter are
implemented lazily.
See Also: LazySequenceType, LazyCollectionType.
Declaration
varlazy:LazyCollection<String.CharacterView>{get}
Declared In
RangeReplaceableCollectionType
, CollectionType
The position of the first Character if self is
non-empty; identical to endIndex otherwise.
Declaration
varstartIndex:String.CharacterView.Index{get}
6 inherited items hidden. (Show all)
Subscripts
Access the characters in the given subRange.
Complexity: O(1) unless bridging from Objective-C requires an O(N) conversion.
Declaration
subscript(subRange:Range<String.CharacterView.Index>) ->String.CharacterView{get}
Access the Character at position.
Requires: position is a valid position in self and
position != endIndex.
Declaration
subscript(i:String.CharacterView.Index) ->Character{get}
Instance Methods
Append c to self.
Complexity: Amortized O(1).
Declaration
mutatingfuncappend(c:Character)
Declared In
String.CharacterView, RangeReplaceableCollectionType
Append the elements of newElements to self.
Declaration
mutatingfuncappendContentsOf<S:SequenceTypewhereS.Generator.Element==Character>(newElements:S)
Declared In
String.CharacterView, RangeReplaceableCollectionType
Returns true iff an element in self satisfies predicate.
Declaration
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns a subsequence containing all but the first element.
Complexity: O(1)
Declaration
funcdropFirst() ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns a subsequence containing all but the first n elements.
Requires: n >= 0
Complexity: O(n)
Declaration
funcdropFirst(n:Int) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns a subsequence containing all but the last element.
Requires: self is a finite sequence.
Complexity: O(self.count)
Declaration
funcdropLast() ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns a subsequence containing all but the last n elements.
Requires: n >= 0
Complexity: O(self.count)
Declaration
funcdropLast(n:Int) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns true iff self and other contain the same elements in the
same order.
Declaration
funcelementsEqual<OtherSequence:SequenceTypewhereOtherSequence.Generator.Element==Generator.Element>(other:OtherSequence) ->Bool
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns true iff self and other contain equivalent elements, using
isEquivalent as the equivalence test.
Requires: isEquivalent is an
equivalence relation.
Declaration
funcelementsEqual<OtherSequence:SequenceTypewhereOtherSequence.Generator.Element==Generator.Element>(other:OtherSequence, @noescapeisEquivalent: (Character,Character)throws->Bool)rethrows->Bool
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns a lazy SequenceType containing pairs (n, x), where
ns are consecutive Ints starting at zero, and xs are
the elements of base:
for (n, c) in "Swift".characters.enumerate() {("\(n): '\(c)'")}0: 'S'1: 'w'2: 'i'3: 'f'4: 't'
Declaration
funcenumerate() ->EnumerateSequence<String.CharacterView>
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns an Array containing the elements of self,
in order, that satisfy the predicate includeElement.
Declaration
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns an Array containing the non-nil results of mapping
transform over self.
Complexity: O(M + N), where M is the length of self
and N is the length of the result.
Declaration
funcflatMap<T>(@noescapetransform: (Character)throws->T?)rethrows->[T]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns an Array containing the concatenated results of mapping
transform over self.
s.flatMap(transform)
is equivalent to
Array(s.map(transform).flatten())
Complexity: O(M + N), where M is the length of self
and N is the length of the result.
Declaration
funcflatMap<S:SequenceType>(transform: (Character)throws->S)rethrows->[S.Generator.Element]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Call body on each element in self in the same order as a
for-in loop.
sequence.forEach{// body code}
is similar to:
forelementinsequence{// body code}
Note: You cannot use the break or continue statement to exit the
current call of the body closure or skip subsequent calls.
Note: Using the return statement in the body closure will only
exit from the current call to body, not any outer scope, and won't
skip subsequent calls.
Complexity: O(self.count)
Declaration
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Declaration
funcgenerate() ->IndexingGenerator<String.CharacterView>
Declared In
RangeReplaceableCollectionType, CollectionType
Returns the first index where predicate returns true for the
corresponding value, or nil if such value is not found.
Complexity: O(self.count).
Declaration
funcindexOf(@noescapepredicate: (Character)throws->Bool)rethrows->String.CharacterView.Index?
Declared In
RangeReplaceableCollectionType, CollectionType
Insert newElement at index i.
Invalidates all indices with respect to self.
Complexity: O(self.count).
Declaration
mutatingfuncinsert(newElement:Character,atIndexi:String.CharacterView.Index)
Declared In
RangeReplaceableCollectionType
Insert newElements at index i.
Invalidates all indices with respect to self.
Complexity: O(self.count + newElements.count).
Declaration
mutatingfuncinsertContentsOf<C:CollectionTypewhereC.Generator.Element==Generator.Element>(newElements:C,ati:String.CharacterView.Index)
Declared In
RangeReplaceableCollectionType
Returns true iff self precedes other in a lexicographical
("dictionary") ordering, using "<" as the comparison between elements.
Note: This method implements the mathematical notion of lexicographical
ordering, which has no connection to Unicode. If you are sorting strings
to present to the end-user, you should use String APIs that perform
localized comparison.
Declaration
funclexicographicalCompare<OtherSequence:SequenceTypewhereOtherSequence.Generator.Element==Generator.Element>(other:OtherSequence) ->Bool
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns true iff self precedes other in a lexicographical
("dictionary") ordering, using isOrderedBefore as the comparison
between elements.
Note: This method implements the mathematical notion of lexicographical
ordering, which has no connection to Unicode. If you are sorting strings
to present to the end-user, you should use String APIs that perform
localized comparison.
Requires: isOrderedBefore is a
strict weak ordering
over the elements of self and other.
Declaration
funclexicographicalCompare<OtherSequence:SequenceTypewhereOtherSequence.Generator.Element==Generator.Element>(other:OtherSequence, @noescapeisOrderedBefore: (Character,Character)throws->Bool)rethrows->Bool
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns an Array containing the results of mapping transform
over self.
Complexity: O(N).
Declaration
funcmap<T>(@noescapetransform: (Character)throws->T)rethrows->[T]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns the maximum element in self or nil if the sequence is empty.
Complexity: O(elements.count).
Declaration
funcmaxElement() ->Character?
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns the maximum element in self or nil if the sequence is empty.
Complexity: O(elements.count).
Requires: isOrderedBefore is a
strict weak ordering
over self.
Declaration
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns the minimum element in self or nil if the sequence is empty.
Complexity: O(elements.count).
Declaration
funcminElement() ->Character?
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns the minimum element in self or nil if the sequence is empty.
Complexity: O(elements.count).
Requires: isOrderedBefore is a
strict weak ordering
over self.
Declaration
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
If !self.isEmpty, remove the first element and return it, otherwise
return nil.
Complexity: O(1)
Declaration
mutatingfuncpopFirst() ->Character?
Declared In
RangeReplaceableCollectionType, CollectionType
If !self.isEmpty, remove the last element and return it, otherwise
return nil.
Complexity: O(self.count)
Deprecated: it will be removed in Swift 3.
Declaration
mutatingfuncpopLast() ->Character?
Declared In
RangeReplaceableCollectionType, CollectionType
Returns a subsequence, up to maxLength in length, containing the
initial elements.
If maxLength exceeds self.count, the result contains all
the elements of self.
Requires: maxLength >= 0
Complexity: O(maxLength)
Declaration
funcprefix(maxLength:Int) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns prefixUpTo(position.successor())
Complexity: O(1)
Declaration
funcprefixThrough(position:String.CharacterView.Index) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType
Returns self[startIndex..<end]
Complexity: O(1)
Declaration
funcprefixUpTo(end:String.CharacterView.Index) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType
Returns the result of repeatedly calling combine with an
accumulated value initialized to initial and each element of
self, in turn, i.e. return
combine(combine(...combine(combine(initial, self[0]),
self[1]),...self[count-2]), self[count-1]).
Declaration
funcreduce<T>(initial:T, @noescapecombine: (T,Character)throws->T)rethrows->T
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Remove all elements.
Invalidates all indices with respect to self.
keepCapacity: If true, is a non-binding request to
avoid releasing storage, which can be a useful optimization
when self is going to be grown again.
Complexity: O(self.count).
Declaration
mutatingfuncremoveAll(keepCapacitykeepCapacity:Bool=default)
Declared In
RangeReplaceableCollectionType
Remove the element at index i.
Invalidates all indices with respect to self.
Complexity: O(self.count).
Declaration
mutatingfuncremoveAtIndex(index:String.CharacterView.Index) ->Character
Declared In
RangeReplaceableCollectionType
Remove the element at startIndex and return it.
Complexity: O(self.count)
Requires: !self.isEmpty.
Declaration
mutatingfuncremoveFirst() ->Character
Declared In
RangeReplaceableCollectionType, CollectionType
Remove the first n elements.
Complexity: O(self.count)
Requires: n >= 0 && self.count >= n.
Declaration
mutatingfuncremoveFirst(n:Int)
Declared In
RangeReplaceableCollectionType, CollectionType
Remove an element from the end.
Complexity: O(1)
Requires: !self.isEmpty
Declaration
mutatingfuncremoveLast() ->Character
Declared In
RangeReplaceableCollectionType, CollectionType
Remove the last n elements.
Complexity: O(self.count)
Requires: n >= 0 && self.count >= n.
Declaration
mutatingfuncremoveLast(n:Int)
Declared In
RangeReplaceableCollectionType, CollectionType
Remove the indicated subRange of elements.
Invalidates all indices with respect to self.
Complexity: O(self.count).
Declaration
mutatingfuncremoveRange(subRange:Range<String.CharacterView.Index>)
Declared In
RangeReplaceableCollectionType
Replace the given subRange of elements with newElements.
Invalidates all indices with respect to self.
Complexity: O(subRange.count) if subRange.endIndex
== self.endIndex and newElements.isEmpty, O(N) otherwise.
Declaration
mutatingfuncreplaceRange<C:CollectionTypewhereC.Generator.Element==Character>(subRange:Range<String.CharacterView.Index>,withnewElements:C)
Reserve enough space to store n ASCII characters.
Complexity: O(n).
Declaration
mutatingfuncreserveCapacity(n:Int)
Declared In
String.CharacterView, RangeReplaceableCollectionType
Returns an Array containing the elements of self in reverse
order.
Complexity: O(N), where N is the length of self.
Declaration
funcreverse() ->[Character]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns an Array containing the sorted elements of source.
The sorting algorithm is not stable (can change the relative order of elements that compare equal).
Requires: The less-than operator (func <) defined in
the Comparable conformance is a
strict weak ordering
over the elements in self.
Declaration
funcsort() ->[Character]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns an Array containing the sorted elements of source
according to isOrderedBefore.
The sorting algorithm is not stable (can change the relative order of
elements for which isOrderedBefore does not establish an order).
Requires: isOrderedBefore is a
strict weak ordering
over the elements in self.
Declaration
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns the maximal SubSequences of self, in order, that
don't contain elements satisfying the predicate isSeparator.
maxSplit: The maximum number of SubSequences to
return, minus 1.
If maxSplit + 1 SubSequences are returned, the last one is
a suffix of self containing the remaining elements.
The default value is Int.max.
allowEmptySubsequences: If true, an empty SubSequence
is produced in the result for each pair of consecutive elements
satisfying isSeparator.
The default value is false.
Requires: maxSplit >= 0
Declaration
funcsplit(maxSplit:Int=default,allowEmptySlices:Bool=default, @noescapeisSeparator: (Character)throws->Bool)rethrows->[String.CharacterView]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns the maximal SubSequences of self, in order, around a
separator element.
maxSplit: The maximum number of SubSequences to
return, minus 1.
If maxSplit + 1 SubSequences are returned, the last one is
a suffix of self containing the remaining elements.
The default value is Int.max.
allowEmptySubsequences: If true, an empty SubSequence
is produced in the result for each pair of consecutive elements
satisfying isSeparator.
The default value is false.
Requires: maxSplit >= 0
Declaration
funcsplit(separator:Character,maxSplit:Int=default,allowEmptySlices:Bool=default) ->[String.CharacterView]
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns true iff the initial elements of self are equal to prefix.
Returns true if other is empty.
Declaration
funcstartsWith<OtherSequence:SequenceTypewhereOtherSequence.Generator.Element==Generator.Element>(other:OtherSequence) ->Bool
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns true iff self begins with elements equivalent to those of
other, using isEquivalent as the equivalence test. Returns true if
other is empty.
Requires: isEquivalent is an
equivalence relation.
Declaration
funcstartsWith<OtherSequence:SequenceTypewhereOtherSequence.Generator.Element==Generator.Element>(other:OtherSequence, @noescapeisEquivalent: (Character,Character)throws->Bool)rethrows->Bool
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns a slice, up to maxLength in length, containing the
final elements of s.
If maxLength exceeds s.count, the result contains all
the elements of s.
Requires: maxLength >= 0
Complexity: O(self.count)
Declaration
funcsuffix(maxLength:Int) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
Returns self[start..<endIndex]
Complexity: O(1)
Declaration
funcsuffixFrom(start:String.CharacterView.Index) ->String.CharacterView
Declared In
RangeReplaceableCollectionType, CollectionType
Returns a value less than or equal to the number of elements in
self, nondestructively.
Complexity: O(N).
Declaration
funcunderestimateCount() ->Int
Declared In
RangeReplaceableCollectionType, CollectionType, SequenceType
46 inherited items hidden. (Show all)
A
String's collection ofCharacters (extended grapheme clusters) elements.